1 files changed, 49 insertions, 0 deletions
diff --git a/internal/image/styles_test.go b/internal/image/styles_test.go
new file mode 100644
index 0000000..4e189c1
--- /dev/null
+++ b/internal/image/styles_test.go
@@ -0,0 +1,49 @@
+package image
+
+import (
+	"reflect"
+	"testing"
+)
+
+func TestArtisticStyles(t *testing.T) {
+	if len(ArtisticStyles) == 0 {
+		t.Fatal("ArtisticStyles should not be empty")
+	}
+	if !hasStyle(ArtisticStyles, "Photorealism") {
+		t.Fatal(`ArtisticStyles should include "Photorealism"`)
+	}
+	if !hasStyle(ArtisticStyles, "Candid Photography") {
+		t.Fatal(`ArtisticStyles should include "Candid Photography"`)
+	}
+}
+
+func TestChooseArtisticStyle_EmptyPool(t *testing.T) {
+	original := ArtisticStyles
+	ArtisticStyles = nil
+	t.Cleanup(func() { ArtisticStyles = original })
+
+	if got := chooseArtisticStyle(); got != defaultArtisticStyle {
+		t.Fatalf("chooseArtisticStyle() = %q, want %q", got, defaultArtisticStyle)
+	}
+}
+
+func TestPickArtisticStyle_DoesNotMutateSharedPool(t *testing.T) {
+	original := append([]string(nil), ArtisticStyles...)
+	t.Cleanup(func() { ArtisticStyles = original })
+
+	ArtisticStyles = []string{"Photorealism", "Surrealism", "Impressionism"}
+	_ = pickArtisticStyle()
+
+	if !reflect.DeepEqual(ArtisticStyles, []string{"Photorealism", "Surrealism", "Impressionism"}) {
+		t.Fatalf("pickArtisticStyle() mutated shared pool: got %v", ArtisticStyles)
+	}
+}
+
+func hasStyle(styles []string, want string) bool {
+	for _, style := range styles {
+		if style == want {
+			return true
+		}
+	}
+	return false
+}